CN105308307B - Engine starting device and engine start control method - Google Patents
Engine starting device and engine start control method Download PDFInfo
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- CN105308307B CN105308307B CN201480033606.3A CN201480033606A CN105308307B CN 105308307 B CN105308307 B CN 105308307B CN 201480033606 A CN201480033606 A CN 201480033606A CN 105308307 B CN105308307 B CN 105308307B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
- F02N2011/0874—Details of the switching means in starting circuits, e.g. relays or electronic switches characterised by said switch being an electronic switch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N2011/0881—Components of the circuit not provided for by previous groups
- F02N2011/0888—DC/DC converters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/022—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/04—Parameters used for control of starting apparatus said parameters being related to the starter motor
- F02N2200/041—Starter speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
- F02N2200/063—Battery voltage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2250/00—Problems related to engine starting or engine's starting apparatus
- F02N2250/02—Battery voltage drop at start, e.g. drops causing ECU reset
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/10—Control related aspects of engine starting characterised by the control output, i.e. means or parameters used as a control output or target
- F02N2300/106—Control of starter current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/10—Control related aspects of engine starting characterised by the control output, i.e. means or parameters used as a control output or target
- F02N2300/108—Duty cycle control or pulse width modulation [PWM]
Abstract
In the case of situation, deterioration of battery even in the undercharge of battery, also promptly start engine in the range of not resetted come the Denso equipment of supply electric power by the battery.The engine starting device of the present invention is by starting the engine starting device of engine by the revolving force of battery-driven d.c. motor is delivered to engine, possessing：Obtain the cell voltage obtaining section of the cell voltage of battery, calculate the target current value calculating part of the target current value of the motor current supplied from battery to d.c. motor and according to cell voltage that cell voltage obtaining section is obtained to make the motor current value of motor current close to controlling to be connected and flow through with d.c. motor the motor current control unit of the circuit element of motor current by way of target current value.
Description
Technical field
The present invention relates to a kind of engine starting device of vehicle and engine start control method.
Background technology
The engine for disclosing raising the restarting property of engine while the requirement of cost degradation is met is automatically stopped startup control
Device processed (for example, referring to patent document 1).It is automatically stopped in the engine in startup control device, in order to need not be to starter
Motor accesses larger electric current, is provided with is directed to the motor that the energization to starter motor is turned on/off in parallel
Mechanical relay and switch element.In the case where carrying out engine stop position control, by switch element come accurately
Control the electrical current of motor.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2010-106825 publications
The content of the invention
The invention technical problem to be solved
It is automatically stopped in the engine disclosed in patent document 1 in startup control device, in the feelings of the undercharge of battery
Under condition, or in deterioration of battery in the case of, make the Denso device reset of supply electric power sometimes through the battery.
Solve the technological means of technical problem
(1) engine starting device that technical scheme 1 is recorded by the revolving force of battery-driven d.c. motor by will be transmitted
Start engine to engine, the engine starting device is characterised by possessing：Cell voltage obtaining section, it obtains the electricity of battery
Cell voltage；Target current value calculating part, it is calculated from battery supply according to the cell voltage obtained by cell voltage obtaining section
To the target current value of the motor current of d.c. motor；And motor current control unit, its control is connected and flows with d.c. motor
The circuit element of motor current is crossed, so that the motor current value of motor current is close to target current value.
(2) the engine start control method that technical scheme 8 is recorded is controlled by by by the rotation of battery-driven d.c. motor
Turn power to be delivered to engine to start the engine start of engine, the engine start control method is characterised by, obtain the electricity of battery
Cell voltage, according to cell voltage, calculates the target current value for the motor current that d.c. motor is supplied to from battery, control and direct current
Motor connects and flows through the circuit element of motor current, so that the motor current value of motor current is close to target current value.
Invention effect
According to the present invention, in the case of situation, deterioration of battery in the undercharge of battery, the electricity can passed through
Pond promptly starts engine in the range of the Denso equipment of supply electric power does not reset.
Brief description of the drawings
Fig. 1 is the engine starting device of the vehicle of one embodiment of the present invention and its pie graph of associated apparatus.
Fig. 2 is the power on signal for being directed to the PWM controls used in the power control for the motor that engine starting device is included
Explanation figure.
Fig. 3 is the ball bearing made figure for showing battery and starter.
Fig. 4 is the figure of the determination method of the energization ratio of the target current value and motor that show motor current.
Fig. 5 is the flow chart for the content for showing engine start control method.
Fig. 6 is the flow chart for the supposition order for showing motor rotary speed.
Fig. 7 is the oscillogram of an example of the temporal change for showing engine start control.
Fig. 8 is the ball bearing made figure for showing other electrical equipments beyond battery, starter and engine starting device.
Symbol description
100 ... engine starting devices
101 ... starters
102 ... magnetic switches
103 ... little gears
104 ... ring gears
105 ... motors
106 ... switches
107 ... switch elements
108 ... one-way clutch
109 ... control devices
110 ... motor rotation sensors
111 ... bars
112 ... engine rotation sensors
301 ... batteries
Embodiment
In automobile in recent years, for the purpose of saving energy resources and environmental protection, it is equipped with when the regulation in driving
Condition set up when make the idling system that engine is temporarily ceased.In the idling system, such as due to waiting letter
When signal lamp etc. and driver stop vehicle etc., engine is set automatically to stop, thereafter, please producing restarting for driver
Time point for asking, when need the engine to operate, engine is automatically restarted.The starter motor of so-called little gear ejecting type
Little gear is ejected, little gear is engaged with being directly linked to the ring gear of engine shaft, passes through the crank based on starter motor
Rotate to start engine.
It is known to have in engine start, electric current is flowed through due to the energization to starter motor in the battery, in battery
In characteristic, ground voltage corresponding to electric current declines.The idling system for also continually making engine stop, restarting in driving
In, if voltage declines, the Denso device reset such as auto-navigation system.Therefore, it is being equipped with conventional idle stop
In the vehicle of system, although can be tackled by accessory power supply etc., but cause the deterioration of carrying property, cost increase.
In the past, as the engine starting device for the engine for starting vehicle using d.c. motor, it is known to which following engine is opened
Dynamic device：By adding resistance to circuit, dash current is reduced, so as to suppress the battery pressure drop at engine start initial stage, thereafter, is led to
Crossing makes resistive short and makes current flow through, it is ensured that crank rotational torque.
It is used as other examples, it is known to following engine starting device：Controlled when engine is restarted by switch element
Energization to motor, slowly increases dutycycle to make the application voltage of motor increase, so as to prevent immediately by using PWM controls
The battery pressure drop after starting that is powered.
However, in conventional engine starting device, be controlled so as to battery current reduces with the time, so starter motor
Output torque reduce, it is possible to can not fully carry out engine crank rotate, engine is restarted time-consuming.In addition, in battery
In the case of undercharge, or in deterioration of battery in the case of, actual cell voltage is less than the electricity that can be allowed sometimes
Cell voltage, Denso device reset.
Engine starting device and engine start the control method maximum limit in the permissible range of battery pressure drop of the present invention
Degree ground restart engine rapidly, even and if battery state change, also cell voltage effect is rested on appearance
Perhaps in the range of.The present invention engine starting device and engine start control method be particularly suitable for by idling system come
When restarting engine.Hereinafter, using Fig. 1~Fig. 8, illustrate one embodiment of the present invention engine starting device and
Engine start control method and their variation.
Fig. 1 is the engine starting device 100 of the vehicle of one embodiment of the present invention and its pie graph of associated apparatus.
Engine starting device 100 include starter 101, for magnetic switch 102 is powered switch 106, for what is be powered to motor 105
Switch element 107 and control device 109.Starter 101 includes magnetic switch 102, little gear 103 and motor 105.Motor 105 is
So-called d.c. motor, rotary driving force is produced by the voltage of additional direct current.In little gear 103, when needed, pass through
Magnetic switch 102 carrys out pull lever 111, so that one-way clutch 108 is moved on motor axis of rotation, with being directly linked to engine shaft
Ring gear 104 is engaged.If the state that little gear 103 has been engaged with ring gear 104, then by being powered to motor 105,
Motor 105 rotates, and the revolving force of motor 105 is delivered to ring gear 104 by one-way clutch 108, engine (not shown)
Rotated.
Control device 109 carries out common fuel injection control, IGNITION CONTROL, air control (electronic control throttle),
And according to the various information such as brake pedal status and speed, control idle stop.
Motor rotation sensor 110 detects the rotation of motor 105.The information of detected motor rotary speed is transfused to
To control device 109.In addition it is also possible to not detect the rotation of motor 105 directly by motor rotation sensor 110, and lead to
Cross and rotate to detect the rotating speed of motor 105 indirectly using the engine detected by engine rotation sensor 112.
By switch 106, magnetic switch 102 is controlled by control device 109.Switch 106 is such as mechanical relay
Switch.In addition, the energization to motor 105 also carries out PWM controls by switch element 107 by control device 109.Switch member
Part 107 is the switch element of the semiconductor such as using MOSFET.
Fig. 2 is the logical of the PWM controls that use in the power control of the motor 105 included for engine starting device 100
The explanation figure of electric signal.Control device 109 exports the pwm signal shown in Fig. 2 as power on signal.According to the pwm signal,
107 pairs of energizations for motor 105 of switch element carry out on/off control.
In fig. 2, in the case where the frequency setting for for example controlling PWM is 10KHz, a cycle of PWM controls
Length T is 0.1ms.In the present embodiment, in the way of reaching control fully fast compared with the electrical time constant of motor,
Determine the frequency of PWM controls.
Energization ratio D in PWM controls is defined as to the interval ratio of energization in one cycle.Such as following formula (1)
Shown, energization ratio D is represented as the interval T being powered in one cycle to motorONThe length T [s] of [s] and a cycle it
Than.
[formula 1]
Energization ratio D is the variable that value can be made to change between 0.0~1.0.Control device 109 is by changing the ratio that is powered
Rate D, controls the turn on angle to motor.
Using Fig. 3, illustrate present embodiment to the battery 301 for driving the supply electric power of engine starting device 100
Characteristic.Fig. 3 shows the ball bearing made figure of battery 301 and starter 101.In general, in the car, most equipment passes through
Battery drives, but herein, illustrate only battery 301 and including the startup of the motor 105 driven by the battery 301
Device 101.Flow through electric current (battery current) I of battery 301bMotor current I with flowing through motor 105mIt is equal.If it is assumed that battery
301 have internal resistance Rb, then according to the internal resistance R of the battery 301b[Ω], the initial voltage of battery 301 (do not flow through electric current
When voltage) V0[V] and battery current Ib[A], output voltage (cell voltage) V of battery 301b[V] is by following formula (2) come really
It is fixed.
[formula 2]
Vb=V0-Ib×Rb…(2)
Understood according to formula (2), due to cell voltage VbPass through battery current IbTo determine, if so can be by battery electricity
Flow IbControl into defined value, then also can be by cell voltage VbControl into defined value.In the feelings of the undercharge of battery 301
Under condition, the initial voltage V of battery 3010The step-down sometimes compared with the state being sufficiently charged.Further, since battery 301 when
Effect change etc., the internal resistance R of battery 301bIncrease, flows through battery current IbWhen cell voltage VbSometimes reduce.In battery
In the case of 301 undercharge, or in the case where battery 301 is deteriorated, even if flowing through identical battery current Ib, electricity
Cell voltage VbAlso reduce, it is possible to produce less than the cell voltage, such as Denso equipment that can be allowed according to from battery 301
The situation of power supply and the operation voltage needed for being acted.
Fig. 4 is the energization of the target current value described later and the motor in above-mentioned PWM controls that show motor current
The figure of the computational methods of ratio.These calculating are carried out by control device 109.Control device 109 is electric from battery (not shown)
The cell voltage V detected by the battery voltage detector etc. is obtained in pressure detection means etc.b, i.e. detect voltage 401.Such as
Shown in Fig. 4 (a), control device 109 compares the detection voltage 401 and mesh set in advance of the acquirement by comparison operation 403
Mark voltage 402.Target voltage 402 is predefined according to minimum voltage action of Denso equipment etc. etc., is stored in advance in control
The inside of device 109.
Control device 109 calculates the difference of both magnitudes of voltage when comparing detection voltage 401 with target voltage 402.Pin
To the difference of magnitude of voltage, in electric current conversion 404, electric current is converted into using predetermined constant, by with the magnitude of voltage
The proportional electric current of difference is added in reference current value 405.When the difference of magnitude of voltage is negative value, from reference current value 405
In subtract the electric current proportional to the difference of magnitude of voltage.By such computing, it is determined that should in the motor 105 of starter 101
The battery current I flowed throughbTarget current value 409.That is, by so-called feedback control, so that cell voltage is close to mesh
The mode of voltage 402 is marked, control is supplied to the battery current I of motor 105 from battery 301b.Proportionally make with the difference of voltage
The mode of electric current increase and decrease is referred to as so-called ratio control.It can also use according to the difference and differential value of voltage or according to electricity
The difference and integrated value of pressure carry out the method for being referred to as so-called PID control of control electric current.
The predetermined constant used when the difference of magnitude of voltage is converted into electric current refers to determine by testing
Feedback oscillator, if reducing it, restrain slack-off., can also be without using when the difference of magnitude of voltage is converted into electric current
The predetermined constant, and use predetermined conversion form.Reference current value 405 is preset, to prevent from not having
During the difference of magnitude of voltage, due to the pressure drop of battery 301, cell voltage VbLess than the minimum voltage action of Denso equipment etc..The electricity
The pressure drop in pond 301 refers to due to the motor current I for showing the current value equal with target current value 409m(correspond to battery electricity
Flow Ib) be fed into motor 105 from battery 301 and produce.Control device 109 stores reference current value so set in advance
405。
Because in the case where the electric current proportional to the difference of magnitude of voltage is added in reference current value 405, battery is electric
Flow IbTarget current value 409 become big, so correspondingly, engine can be started quickly.Subtracted from reference current value 405
In the case of the electric current proportional to the difference of magnitude of voltage, although engine start takes, but is able to ensure that Denso equipment etc.
The cell voltage V of size more than minimum voltage actionb。
Control device 109 obtains the motor rotary speed of motor 105 from motor rotation sensor 110.Control device 109
According to the motor rotary speed and detection voltage 401 so obtained, so that motor current Im(correspond to battery current Ib) current value approach
In the mode of target current value 409, controlling switch element 107.That is, as shown in Fig. 4 (b), for target current value 409, it is determined that
The energization ratio exported by using the energization ratio calculations 407 of the information of motor rotary speed.Illustrate that energization ratio is transported using Fig. 3
The details of calculation 407.
In Fig. 3 motor part 101, using including internal resistance, the resistance of switch element inside routing resistance, motor
Deng motor resistance Rm, battery current Ib(motor current Im) [A], the counter electromotive force V based on motor rotatione[V] or motor
105 back EMF coefficient keThe motor rotary speed N of [V/rpm] and motor 105m[rpm], can represent electricity by following formula (3)
Cell voltage Vb[V]。
[formula 3]
Vb=Ib×Rm+Ve
=Ib×Rm+ke×Nm…(3)
Herein, by formula (2) and (3), following formula (4) can be obtained.
[formula 4]
V0-Ib×Rb=Ib×Rm+ke×Nm
It will also realize that according to formula (4), in general, as the motor rotary speed N in d.c. motormFor 0 when, the when of being initially powered up,
Electric current flows through most, if rotating speed becomes big, electric current tails off.
In formula (4), the controls of the PWM based on control device 109 by switch element 107 are not considered.I.e. formula (4) is corresponding
In the lasting state of the energization for motor 105.According to the research of the inventors of the present invention, it was found that in PWM controls, pin
To energization ratio D, electric current can be by following formula (5) come approximate.If using formula (5), passing through the energization ratio for controlling PWM
D changes, and can be constant by current control.
[formula 5]
Understood according to formula (5), in the present embodiment, in PWM controls, the electric current I flowed through in the batterybCompare with being powered
Rate D's is square proportional.In the composition shown in Fig. 3, due to the motor current I flowed through in the motor 105 of starter 101m
With battery current IbIt is equal, so motor current ImCan similar to for d.c. motor 105 energization carry out PWM controls
Energization ratio D's when processed is square proportional.This is approximately the research by the inventors of the present invention, is experimentally being observed
On the basis of theoretically determine.But, formula (5) is only electric relative to motor in a cycle that can be considered as PWM
That is set up in the abundant fast scope of time constant is approximate, represents battery current IbAccording to constant and by motor rotary speed NmAnd energization
Two variables that ratio D is constituted are determined.In order to utilize this approximate in turn, so that defined battery current I can be obtainedbSide
Formula determines energization ratio D, and formula (5) is deformed shown in such as following formula (6).
[formula 6]
According to formula (6), in the present embodiment, by battery current IbIt is set as on the basis of target current value 409, root
According to motor rotary speed NmTo determine energization ratio D.But in the case where the energization ratio D calculated by formula (6) is more than 1.0,
Energization ratio is set to 1.0.
Fig. 5 is the engine start control carried out in engine starting device 100 by control device 109 for showing present embodiment
The flow chart of the content of method processed.If as shown in figure 5, the startup request of engine is produced, in step S510, shown in Fig. 1
Control device 109 starter 101 and engine (not shown) are linked.In the case of little gear pushing method, by the small of Fig. 1
Gear 103 is ejected, and it is engaged with being directly linked to the ring gear 104 of engine.It is in applying starter 101 with engine
In the case of the idle stop mode of connecting state, in idle stop, the time point of startup request, starter 101 are being produced
Connecting state is had become with engine.In such a case it is not necessary to carry out the processing in step S510.
In step S520, control device 109 obtains the motor resistance R prestoredmWith the counter electromotive force system of motor
Number ke.In step S530, control device 109 obtains the battery electricity detected by battery voltage detector (not shown) etc.
Press Vb.In step S540, the target voltage that control device 109 calculates according to the minimum voltage action of Denso equipment etc. to determine
402 and cell voltage VbDifference.In step S550, control device 109 is according to target voltage 402 and cell voltage VbDifference
The reference current value 405 for dividing and having prestored, the order as shown in Fig. 4 (a) calculates target current value 409.In step S560
In, control device 109 obtains motor rotary speed N from motor rotation sensor 110m。
In step S570, control device 109 utilizes the variable obtained in step S520 to S560 various processes
And constant, the energization ratio D of PWM controls is calculated by formula (6), the waveform signal that PWM is controlled is output to switch element
107, controlling switch element 107.By being controlled by control device 109 PWM of switch element 107, start stream in motor 105
Overcurrent, the torque of motor 105 is passed to engine, and engine starts rotation.
Then, control device 109 persistently carries out the processing in step 530~S570, until the engine shown in step S580
Untill start completion condition is set up.Condition is completed as step S580 engine start, for example, is set to engine and is rotated up to regulation
Rotating speed more than.If meeting such completion condition, it can interpolate that and completed for engine start.It is completed in engine start
Before, control device 109 is with fixed intervals (such as 2ms intervals) detection cell voltage VbWith motor rotary speed Nm, calculate energization ratio D
And update output.By the way that so, in a period of being completed being powered since motor to engine start, battery current is approximately fixed,
As set current value, so cell voltage VbAlso it is approximately fixed and in the permissible range, and be controlled as and hold
Perhaps it is worth close value.
--- variation---
(1) because before engine start completion, in order to which the revolving force of motor 105 is delivered into engine, starter 101 with
Engine is in connecting state, so can also obtain motor rotary speed N indirectly according to engine speedm。
After Fig. 5 step S510, if that is, the motor 105 of starter 101 is in link shape with engine (not shown)
State, then can calculate the motor rotary speed N of motor indirectly according to the engine speed of enginem.In most of automobiles, such as Fig. 1 institutes
Show, be equipped with the engine rotation sensor 112 of detecting and alarm rotating speed.By being counted indirectly according to the engine speed detected
The rotating speed of the motor 105 of starter 101 is calculated, without carrying motor rotation sensor 110 so that cost is reduced.
According to engine speed Ne[rpm] calculates the motor rotary speed N of motor 105 with transformation of speed coefficient gmWhen [rpm], for example, it can make
With following formula (7).
[formula 7]
Nm=Ne×g…(7)
Transformation of speed coefficient g in formula (7) can be obtained by the gear ratio of engine and motor 105.Specifically, exist
In the case of having linked motor 105 and engine by little gear 103 and ring gear 104, using according to little gear 103 and
The respective number of teeth of ring gear 104 can obtain transformation of speed coefficient g come the gear ratio determined, and when inside starter 101
In the case of being provided with reducing gear between motor 105 and little gear 103, according to the speed reducing ratio of reducing gear, it can obtain
Transformation of speed coefficient g.Transformation of speed coefficient g is stored in advance in control device 109, will be detected inside control device 109
The engine speed N arrivedeIt is transformed into motor rotary speed Nm。
(2) starter is configured to set one-way clutch transmitting the interval of revolving force from motor to engine mostly, only from
Transmit revolving force in starter side.If due to engine start burning and rotating speed be more than the rotation based on starter, cut off clutch
The connection of device, so the starter rotating speed and the starter rotating speed of reality that are now calculated according to engine speed are inconsistent.
Illustrate calculated according to engine speed and in the case of obtaining motor rotary speed indirectly, thus it is speculated that calculated
Value and reality motor rotary speed between produce the method for motor rotary speed when deviating from.Most starter 101 is configured to from horse
The interval of revolving force is transmitted to engine (not shown) up to 105 and one-way clutch 108 is set, only transmit and rotate from the side of starter 101
Power.It can rotate engine by the revolving force of motor 105, but engine rotates motor 105, so the horse with reality
Compared up to rotating speed, the motor rotary speed for being calculated and being obtained indirectly according to engine speed represents higher value sometimes.Now, push away
Survey motor rotary speed.
Fig. 6 is the flow chart of the supposition order for the rotating speed for showing motor 105.When the engine speed due to burning increases sharply,
It is assumed that the rotating speed of the motor 105 substantially to uncharge state that is formed by connecting of cut-out clutch is risen with certain gradient.
On the basis of such hypothesis, for the motor rotary speed N obtained indirectlym, by the rotating speed in each controlling cycle
Rise and the upper limit is set, for steeply rising that engine rotates, thus it is speculated that motor rotary speed.
For the engine speed N detected according to engine rotation sensor 112eCome turning for the motor that obtains indirectly
Fast Nm, use the rotating speed N for considering the motormThe supposition motor rotary speed Nm_ deduced away from the possibility of actual motor rotary speed
Out, calculates energization ratio D.In each controlling cycle repeat the processing, using the result of calculation before a controlling cycle as
Nm_outt-1It is stored in advance in control device.In addition, the upper limit of the rising as the motor rotary speed in each controlling cycle, in advance
First set higher limit Δ N.
In step S610, Fig. 1 control device 109 will be to speculating motor rotary speed Nm_outt-1Affix limit Δ N and
The supposition motor rotary speed newly deduced is set to Nm′.The supposition motor rotary speed N newly deducedm' it is considered as relative to a cycle
Preceding supposition motor rotary speed Nm_outt-1The maximum value that can rise in a controlling cycle.
In step S620, the motor rotary speed N that control device 109 is obtained more indirectlymWith speculating motor rotary speed Nm', sentence
It is fixed whether to generate away from actual motor rotary speed.In step S620, control device 109 is to Nm≧Nm' carried out negating to sentence
In the case of fixed, be judged as between the motor rotary speed and the motor rotary speed of reality obtained indirectly without departing from.In step
In S640, control device 109 is by the motor rotary speed N obtained indirectlymSupposition motor rotary speed Nm_out is directly substituted into, horse will be speculated
Up to calculating of the rotating speed Nm_out for the ratio D that is powered.
In step S620, control device 109 is to Nm≧Nm' carried out in the case of judging certainly, it is judged as indirect
Exist between motor rotary speed and the motor rotary speed of reality that ground is obtained and deviate from.In this case, in step S630, control dress
Motor rotary speed N will be speculated by putting 109m' supposition motor rotary speed Nm_out is substituted into, it will speculate that motor rotary speed Nm_out is used for the ratio that is powered
D calculating.By so, in the case of obtaining motor rotary speed indirectly, produce even in being calculated according to engine speed
Away from actual motor rotary speed, energization ratio D also can be correctly calculated.
Fig. 7 is the oscillogram of an example of the temporal change for showing engine start control, by engine speed, from control
The temporal change of energization ratio D, cell voltage and battery current that device 109 processed is exported is schemed with being mapped
Show.
In the example shown in Fig. 7, energization ratio is calculated using only engine speed.Because control device 109 is according to drawing
Hold up rotating speed and obtain motor rotary speed indirectly by calculating, it is contemplated that the motor rotary speed deduced and actual motor rotary speed
Between the rotating speed for deviating from and carrying out motor supposition.Represented to control to fill according to the gear ratio of motor and engine with dotted line 703
Put 109 motor rotary speeds so deduced and be converted into value obtained from the rotating speed in engine shaft.Battery current 705 during energization is such as
Shown in Fig. 7, certain, to have essentially become set battery current (motor electricity is at first substantially smoothly remained since being powered
Stream) target current value.Cell voltage 704 when understanding to be powered is similarly, steady as shown in Figure 7 and be not less than and allow
Restart engine minimum voltage.Similarly be not less than in the case of having further acknowledged in deterioration of battery allow minimum voltage and
Restart engine.
(3) energization ratio D other determination methods are illustrated.Fig. 8 is to show starter 101, battery 301 and starter
The ball bearing made figure of other electrical equipments 803 beyond 101 motor 105.Electric power from battery 301 is fed not only to start
The motor 105 of device 101, is also fed to other electrical equipments 803.Illustrate other electricity beyond the motor 105 with reference to starter 101
The electricity needs of gas equipment suitably changes the method that motor current is flowed through in motor 105.In Fig. 3 ball bearing made figure,
The battery current flowed out from battery mostly as motor current flows to motor.But, in actual vehicle, except starter
Beyond 101 motor 105, other electrical equipments 803 that electric current flows through also are there are.
Flow through the battery current I of battery 301b, supplied from battery 301 to the motor 105 of starter 101 and flow through motor
105 electric current ImAnd other electrical equipments 803 beyond from battery 301 to motor 105 supply and flow through other electrical equipments
803 total supply electric current IeBetween, the relation shown in following formula (8) is set up.
[formula 8]
Ib=Im+Ie
Im=Ib-Ie…(8)
As shown in formula (8), battery current IbIt is motor current ImSupply electric current I with flowing through the electrical equipment beyond motore
Sum.The cell voltage V in order to avoid the pressure drop due to battery 301bLess than the minimum voltage action of Denso equipment etc., battery electricity
Flow IbNeed with current value more than allowed battery current.It is configured to by will subtract from the cell current value allowed
The supply electric current I of other electrical equipments 803 gone beyond motor 105eObtained from current value be set as motor current ImThe upper limit
Value, so that generally by battery current IbRegularly remain allowed cell current value.Be configured to directly or
The supply electric current I for flowing through other electrical equipments 803 beyond motor 105 is obtained indirectlye.For example, current sensor is directly counted
Supply electric current I of the flow measurement through other electrical equipments 803 beyond motor 105e, control device 109 is obtained from current sensor should
Measured value.The usually used electric current of multiple electrical equipments that other electrical equipments 803 are included is stored in advance in control respectively
In device 109, in the case of using these electrical equipments, control device 109 is set to flow through the electric current prestored, indirectly
Calculate the current value for the supply electric current for flowing through other electrical equipments 803 beyond motor 105.Taken by such control device 109
Obtain the supply electric current I of other electrical equipments 803 beyond motor 105e, can calculate in order to by battery current IbRegularly keep
The motor current I of motor 105 is flowed to for the cell current value allowedmTarget current value.Control device 109 uses following formula
(9) the energization ratio D to motor 105 is calculated.
[formula 9]
Flow through the supply electric current I of other electrical equipments 803 beyond motor 105eChange, also using formula (8)
To determine the motor current I flowed through in motor 105mTarget current value, calculated by using formula (9) to the logical of motor 105
Electric ratio D, can be by battery current IbRemain fixation.Therefore, it is possible to which the pressure drop of battery 301 is being controlled in into permissible range
Engine is set promptly to restart to greatest extent simultaneously.
(4) in the engine starting device 100 of above-mentioned embodiment or its variation, control device 109 is directly
Or the motor rotary speed N of motor 105 is obtained indirectlym.But it is also possible to which when manufacturing engine starting device 100, engine is opened
The motor rotary speed N of motor 105 when dynamicmModel and be stored in advance in control device 109.When actual engine starts, control
Device 109 processed is by determining appropriate model, from the motor rotary speed N of the motor 105 storedmMiddle selection and fitting that this is determined
When the corresponding motor rotary speed N of modelmTo obtain.
(5) in the engine starting device 100 of above-mentioned embodiment or its variation, control device 109 is so that horse
Up to electric current ImMotor current value close to target current value 409 mode, control be connected with motor 105 and flow through motor current
ImSwitch element 107.But, instead the circuit element of switch element 107, can also match somebody with somebody in the inside of starter 101
Put variable resistor.Control device 109 is so that motor current ImMotor current value close to target current value 409 mode, control
System is connected with motor 105 and flows through motor current ImVariable resistor, adjust variable resistor resistance value.
The engine starting device 100 of above-mentioned embodiment or its variation is the horse by will be driven by battery 301
Revolving force up to 105 is delivered to engine and starts the engine starting device 101 of engine, with control device 109.Control device
109 obtain the cell voltage V of battery 301b.Control device 109 is according to acquired cell voltage Vb, calculate and supplied from battery 301
To the motor current I of motor 105mTarget current value 409.Control device 109 is so that motor current ImMotor current value approach
In the mode of target current value 409, control is connected with motor 105 and flows through motor current ImSwitch element 107 or variable
The circuit elements such as resistance.In such engine starting device 100, following effect can be obtained.That is, being powered since motor
During being completed to engine start, by controlling motor current ImAnd by battery current IbApproximately fixed arbitrary value is remained,
Also can be by cell voltage VbRemain approximately fixed.Especially since repeating to obtain cell voltage VbAnd every time to motor current
ImTarget current value calculated again, so horse can be adjusted according to the state change for producing the batteries 301 such as pressure drop drastically
Up to electric current Im.By that so, even if the state of battery changes, also battery pressure drop can be made to rest in permissible range,
Cell voltage V during engine startbBe not less than feasible value (minimum voltage action of Denso equipment etc.) and in this condition and most
Start engine rapidly to limits.
In the case where using switch element 107 as foregoing circuit element, according to motor rotary speed Nm, control device
109 determine the energization ratio D to motor 105 based on PWM controls.This is made to the output of switch element 107 by control device 109
The pwm control signal of energization ratio D changes, so that switch element 107 can make motor current ImChange.
In variation (1) and (2), control device 109 is according to engine speed NeHorse is obtained indirectly by calculating
The rotating speed N reachedm.In this case, due to the motor for rotating detection of motor 105 need not be installed in starter 101
Rotation sensor 110, so that cost is reduced.
In variation (3), control device 109 is obtained is used as power supply beyond motor 105 using identical battery 301
The electric current I flowed through in other electrical equipments 803e, so that battery current IbIt is as general as fixed mode and has controlled motor current
ImIn the case of the circuit element flowed through, big electric current is flowed through in other electrical equipments 803 beyond motor 105,
The pressure drop of battery 301 can be controlled in permissible range.
Claims (9)
1. a kind of engine starting device, it by the revolving force of battery-driven d.c. motor by will be delivered to engine to start
Engine is stated, the engine starting device is characterised by possessing：
Cell voltage obtaining section, it obtains the cell voltage of the battery；
Target current value calculating part, it is calculated from institute according to the cell voltage obtained by the cell voltage obtaining section
State the target current value that battery is supplied to the motor current of the d.c. motor；And
Motor current control unit, it controls the circuit element for being connected and flowing through the motor current with the d.c. motor, so that
The motor current value of the motor current close to the target current value,
The target current value calculating part, according to target voltage and the voltage differential and the target current of the cell voltage
The reference current value of value, calculates the target current value, and the target voltage is based on other electricity beyond the d.c. motor
Operation voltage of the gas equipment according to needed for acting the power supply from the battery is determined.
2. engine starting device according to claim 1, it is characterised in that
It is also equipped with obtaining the motor rotary speed obtaining section of the motor rotary speed of the d.c. motor,
The motor current control unit is according to the cell voltage obtained by the cell voltage obtaining section and by described
The motor rotary speed that motor rotary speed obtaining section is obtained, controls the circuit element, so that the motor current value is close to institute
State target current value.
3. engine starting device according to claim 2, it is characterised in that
The motor current control unit is stored to the reference current value of the target voltage and the target current value,
The reference current value stored by the motor current control unit is preset, to prevent in not described voltage difference
Timesharing, the cell voltage is less than the operation voltage due to the pressure drop of the battery, and the pressure drop of the battery is because showing
The motor current of the current value equal with the target current value is supplied to the d.c. motor from the battery and produced
Raw.
4. the engine starting device according to claim 2 or 3, it is characterised in that
The motor current control unit controls the circuit element according to energization ratio, thus performs and repeats from the electricity
Pond is controlled to the beginning of the energization of the d.c. motor and the PWM of stopping, and the energization ratio is with the energization from described
Start the time to the stopping, with the energization since it is described begin to pass through the stopping again to the time described it
Than representing,
The motor current control unit is according to the cell voltage, the battery obtained by the cell voltage obtaining section
Internal resistance, by the target current value calculating part calculate the target current value, pass through the motor rotary speed obtaining section
The back EMF coefficient of the motor rotary speed, the motor resistance that the d.c. motor has and the d.c. motor that obtain, comes
Determine the energization ratio.
5. engine starting device according to claim 4, it is characterised in that
The motor rotary speed obtaining section obtains the motor rotary speed from the motor rotation detection portion for detecting the motor rotary speed.
6. engine starting device according to claim 4, it is characterised in that
The motor rotary speed obtaining section obtains the engine speed of the engine, according to the engine speed, obtains the motor and turns
Speed.
7. engine starting device according to claim 3, it is characterised in that
It is also equipped with obtaining the supply electric current obtaining section of the supply electric current supplied from the battery to other described electrical equipments,
The target current value calculating part is according to the cell voltage obtained by the cell voltage obtaining section and the mesh
Mark voltage the voltage differential, by the motor current control unit store the reference current value and pass through it is described supply
The supply electric current obtained to electric current obtaining section, calculates the target current value.
8. a kind of engine start control method, it is controlled by will be delivered to engine by the revolving force of battery-driven d.c. motor
To start the engine start of the engine, the engine start control method is characterised by,
The cell voltage of the battery is obtained,
According to the cell voltage, the target current value for the motor current that the d.c. motor is supplied to from the battery is calculated,
Control is connected and flowed through the circuit element of the motor current with the d.c. motor, so that the motor of the motor current
Current value close to the target current value,
When calculating the target current value, according to target voltage and the voltage differential of the cell voltage and target electricity
The reference current value of flow valuve, calculates the target current value, and the target voltage is based on other beyond the d.c. motor
Operation voltage of the electrical equipment according to needed for acting the power supply from the battery is determined.
9. engine start control method according to claim 8, it is characterised in that
The reference current value is preset, to prevent that, in the not voltage differential, the cell voltage is due to the electricity
The pressure drop in pond and less than the operation voltage, the pressure drop of the battery is because the motor current from the battery is fed into institute
State d.c. motor and produce, the motor current shows the current value equal with the target current value,
The motor rotary speed of the d.c. motor is obtained,
When controlling the circuit element so that the motor current value is close to the target current value, according to battery electricity
Pressure and the motor rotary speed, control the circuit element.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013125867A JP6062324B2 (en) | 2013-06-14 | 2013-06-14 | Engine starter and engine start control method |
| JP2013-125867 | 2013-06-14 | ||
| PCT/JP2014/063009 WO2014199772A1 (en) | 2013-06-14 | 2014-05-16 | Engine start-up device, and engine-start-up control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105308307A CN105308307A (en) | 2016-02-03 |
| CN105308307B true CN105308307B (en) | 2017-10-31 |
Family
ID=52022073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480033606.3A Expired - Fee Related CN105308307B (en) | 2013-06-14 | 2014-05-16 | Engine starting device and engine start control method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9765745B2 (en) |
| EP (1) | EP3009667A4 (en) |
| JP (1) | JP6062324B2 (en) |
| CN (1) | CN105308307B (en) |
| WO (1) | WO2014199772A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946604B (en) * | 2011-11-17 | 2016-03-16 | 丰田自动车株式会社 | Starter for vehicle engine |
| JP6948844B2 (en) * | 2017-06-06 | 2021-10-13 | 日立Astemo株式会社 | Engine starter |
| JP7010044B2 (en) * | 2018-02-13 | 2022-01-26 | トヨタ自動車株式会社 | Vehicle engine start control device |
| JP7189421B2 (en) * | 2018-09-21 | 2022-12-14 | ミツミ電機株式会社 | Motor drive circuit and motor drive device |
| WO2021225589A1 (en) * | 2020-05-06 | 2021-11-11 | Innovative Power Solutions, Llc | Starter-generator speed control |
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| CN101078380A (en) * | 2006-05-24 | 2007-11-28 | 本田技研工业株式会社 | Controlling device for internal combustion engine |
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- 2014-05-16 EP EP14810127.2A patent/EP3009667A4/en not_active Withdrawn
- 2014-05-16 WO PCT/JP2014/063009 patent/WO2014199772A1/en active Application Filing
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| CN101078380A (en) * | 2006-05-24 | 2007-11-28 | 本田技研工业株式会社 | Controlling device for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| US9765745B2 (en) | 2017-09-19 |
| JP6062324B2 (en) | 2017-01-18 |
| US20160138549A1 (en) | 2016-05-19 |
| WO2014199772A1 (en) | 2014-12-18 |
| EP3009667A4 (en) | 2017-09-20 |
| JP2015001187A (en) | 2015-01-05 |
| CN105308307A (en) | 2016-02-03 |
| EP3009667A1 (en) | 2016-04-20 |
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